[FIXED] How do I display list of email id From mail chimp API version 3?

Issue

I have Update the particular list id with email subscription and now i want to extract all that email id and want to check if that particular email id is already exist or not and show message "email is already exist" and if not then insert that email id in mail chimp.

function mailchimp_subscriber_status( $email, $status, $list_id, $api_key, $merge_fields = array('FNAME' => '','LNAME' => '') ){
    $data = array(
        'apikey'        => $api_key,
            'email_address' => $email,
        'status'        => $status,
        'merge_fields'  => $merge_fields
    );

    $mch_api = curl_init(); // initialize cURL connection

    curl_setopt($mch_api, CURLOPT_URL, 'https://' . substr($api_key,strpos($api_key,'-')+1) . '.api.mailchimp.com/3.0/lists/' . $list_id . '/members/' . md5(strtolower($data['email_address'])));
    //curl_setopt($mch_api, CURLOPT_USERPWD, 'user:' . $api_key);
    //curl_setopt($mch_api, CURLOPT_HTTPHEADER, ['Content-Type: application/json']);
    curl_setopt($mch_api, CURLOPT_HTTPHEADER, array('Content-Type: application/json', 'Authorization: Basic '.base64_encode( 'user:'.$api_key )));
    curl_setopt($mch_api, CURLOPT_USERAGENT, 'PHP-MCAPI/2.0');
    curl_setopt($mch_api, CURLOPT_RETURNTRANSFER, true); // return the API response
    curl_setopt($mch_api, CURLOPT_CUSTOMREQUEST, 'PUT'); // method PUT
    curl_setopt($mch_api, CURLOPT_TIMEOUT, 10);
    curl_setopt($mch_api, CURLOPT_POST, true);
    curl_setopt($mch_api, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($mch_api, CURLOPT_POSTFIELDS, json_encode($data) ); // send data in json

    $result = curl_exec($mch_api);
    $httpCode=curl_getinfo($mch_api, CURLINFO_HTTP_CODE);
    //var_dump($httpCode); die;
    //$json = json_decode($result);
    //echo $json->{'status'}; die;
    //var_dump($result); die;
    return $result;
}

Solution

$httpCode=curl_getinfo($mch_api, CURLINFO_HTTP_CODE);  
if ($httpCode == 200) {
            $_SESSION['msg'] = '<p style="color: #34A853">You have successfully subscribed to CodexWorld.</p>';
        } else {
            switch ($httpCode) {
                case 214:
                    $msg = 'You are already subscribed.';
                    break;
                default:
                    $msg = 'Some problem occurred, please try again.';
                    break;
            }
            $_SESSION['msg'] = '<p style="color: #EA4335">'.$msg.'</p>';
        }
    }else{
        $_SESSION['msg'] = '<p style="color: #EA4335">Please enter valid email address.</p>';
    }

Answered By - Riddhi Rathod

Answer Checked By - Pedro (PHPFixing Volunteer)